//SetUpLogging configures logging based on configuration
func SetUpLogging(config *util.Config) error {
var backends = []logging.Backend{}
if prefix := "logging/file/"; config.GetBool(prefix+"enabled", false) {
logFile, err := os.OpenFile(config.GetString(prefix+"filename", "gohan.log"),
os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0660)
if err != nil {
return err
}
fileBackendLeveled := getLeveledBackend(logFile, mustGohanJSONFormatter("gohan"))
addLevelsToBackend(config, prefix, fileBackendLeveled)
backends = append(backends, fileBackendLeveled)
}
if prefix := "logging/stderr/"; config.GetBool(prefix+"enabled", true) {
stringFormatter := logging.MustStringFormatter(
"%{color}%{time:15:04:05.000} %{module} %{level} %{color:reset} %{message}",
)
stderrBackendLeveled := getLeveledBackend(os.Stderr, stringFormatter)
addLevelsToBackend(config, prefix, stderrBackendLeveled)
backends = append(backends, stderrBackendLeveled)
}
logging.SetBackend(backends...)
return nil
}
func addLevelsToBackend(config *util.Config, prefix string, backend logging.LeveledBackend) {
level, _ := logging.LogLevel(config.GetString(prefix+"level", defaultLogLevel))
backend.SetLevel(level, "")
modules := config.GetList(prefix+"modules", []interface{}{})
for _, rawModule := range modules {
module, _ := rawModule.(map[string]interface{})
moduleName, _ := module["name"].(string)
moduleLevel, _ := module["level"].(string)
level, err := logging.LogLevel(moduleLevel)
if moduleName == "" || err != nil {
continue
}
backend.SetLevel(level, moduleName)
}
}